Yarn treating method

ABSTRACT

A plurality of sheet-like yarn groups each consisting of a number of parallel yarns are drawn out from respective supply beams and laminated in layers to form a laminated yarn group. The laminated yarn group is divided into a plurality of parallel narrow yarn groups and subjected to treatment in liquid. Each treated narrow yarn group is wound up on an associated take-up beam.

United States Patent 11 1 1111 3,789,469

Kodama Feb. 5, 1974 15 YARN TREATING METHOD 2,563,642 8/1951 Colombu eta1. 242/355 R 2,568,446 9/1951 Griffin 28/726 X [75] Invent Kmama,Shlzuoka, JaPa 2,603,852 7/1952 Fleischer 28/40 x [73] Assignee: flljiSpinning C0., Ltd., Tokyo, FOREIGN PATENTS OR APPLICATIONS apan 121,3107/1927 Switzerland 28/28 [22] Filed: Feb. 15, 1972 Prima ExaminerRobertR. Macke 21 A 1. N .1 226,490 W Y 1 pp 0 Attorney, Agent, or FirmEliotS. Gerber [52] U.S. Cl 28/72.6, 28/28, 28/33, 57 ABSTRACT 28/37, 28/40,242/355 R 1 [51] Int Cl D02h 9/00 D0211 5 [02 A plurallty of sheet-hkeyarngroups each conslsting of [58] Field of searchmzslzs 29 33 37 40 725a number of parallel yarns are drawn out from respec- 2 5 5 tive supplybeams and laminated in layers to form a laminated yarn group. Thelaminated yarn group is di- [56] References Cited vided into a pluralityof parallel narrow yarn groups UNITED STATES PATENTS and subjected totreatment in liquid. Each treated narrow yarn group is wound up on anassociated take-up 811,358 l/l906 Baer 28/33 X beam 1,362,165 12/1920Kuenneth.., 2,249,988 7/1941 Thomas 242/355 R 4 Claims, 11 DrawingFigures Patented Feb. 5, 1974 4 Sheets-Sheet 1 FIG.1

Patented Feb. 5, 1974 7 3,789,469

4 Sheets-Sheet 2 Patented Feb. 5, 1974 I 3,789,469

4 Sheets-Sheet 5 Patented Feb. 5, 1974 3,789,469

4 Sheets-Sheet 4 Fl GJQ F'IGJI YARN TREATING METHOD This inventionrelates to a yarn treating method and more particularly to a method fortreating a number of yarns which are subjected to treatment in liquid.

For continuously treating a number of yarns in a liquid, such as formercerization, it has been proposed, as taught in the case of warpsizing for preparation of woven fabric, to pull out a plurality of yarnsfrom bobbins on a creel and arrange them in parallel with each otherinto the form of a wide sheet-like yarn group, which is then wound up ona warper beam. A plurality of warper beams thus wound are arrayed andthe sheetlike yarn groups are taken out from the beams to be laminatedin layers. Thereafter, the laminated yarn groups in layers are subjectedto mercerization.

Such a method will have some advantages in that, since the yarns arearranged in the sheet-like yarn groups and laminated in layers, theywill hardly entangle with each other while in processing, and that,after treatment in liquid, the processes for separating the laminatedyarn groups into each sheet-like yarn group and for separating thelatter into each yarn will be effected with ease.

However, in the yarn treating methods like mercerization, the yarns aresubjected repeatedly to liquid immersion and exposure to the atmospherewhile passing through several to or more treating liquid vessels underpositive tension. Accordingly, such wide laminated yarn groups tend todevelop slits therein during treatment. This is considered to beattributable to the fact that each individual yarn swells, shrinks andextends during mercerization and is coupled with other factors such assurface tension of the treating liquid and yarn density. Therefore, evenif each sheet-like yarn group is so controlled as to form a uniformlayer when it is fed, it is extremely difficult to maintain suchuniformity throughout the working process. Furthermore, such sheet slitscause non-uniformity of working treatment (non-uniform penetration ofthe treating liquid or unevenness of tension) and have bad affects uponthe separatability of the yarns, resulting in degradation of productsand reduction of productivity.

Such sheet slits may be prevented if the laminated yarn groups areformed with fairly increased thickness. In such a case, however, thetreating liquid can hardly penetrate uniformly through such wide andthick layers of the yarn groups, causing non-uniformity in thetreatment.

Furthermore, when the yarns are merely arranged parallel to each otherin the form of wide sheet and laminated in layers, the processes forseparating the broad sheet groups into each yarn after treatment and forwinding them up on respective bobbins disposed in the predeterminedarrangement will be troublesome.

Accordingly, an object of the present invention is to provide a yarntreating method in which sheet-like yarn groups laminated in layers aretreated without any sheet slit in treating liquid.

Another object of the present invention is to provide a yarn treatingmethod in which yarn groups having been treated can be very certainlyand rapidly separated into individual yarns.

A further object of the present invention is to provide a yarn treatingmethod in which yarn groups laminated in multiple layers can beuniformly and positively treated in treating liquid.

According to the present invention, a plurality of sheet-like yarngroups each consisting of a number of parallel yarns are drawn out fromrespective supply beams and laminated in layers to form a laminated yarngroup. The laminated yarn group is divided into a plurality of parallelnarrow yarn groups and subjected to treatment in liquid. Each narrowyarn group is wound up on an associated beam.

The aforementioned and other objects and features of the invention willbe apparent from the following detailed description of a specificembodiment thereof, when read in conjunction with the accompanyingdrawings, in which:

FIGS. 1 and 2 are a side view and a plan view, respectively, showingschematically a warping process in the method according to the presentinvention;

FIG. 3 is an enlarged plan view of a portion A enclosed by a chain linein FIG. 2;

FIG. 4 is a schematic side view showing principal portions of the yarntreating method according to the present invention;

FIG. 5 is a plan view showing a process in which a plurality ofsheet-like yarn groups are laminated and then divided into narrowtape-like yarn groups;

FIG. 6 is a sectional view of a guide member whereby the laminatedsheet-like yarn group is divided into the narrow tape-like yarn groups;

FIG. 7 is a plan view showing a process in which the narrow tape-likeyarn groups are wound up on associated beams;

FIGS. 8 and 9 are a side view and a plan view, respectively, showing aprocess in which each yarn group wound up on the associated beam isseparated into individual yarns;

FIG. 10 is a schematic side view of a final yarn separating process inwhich a beater and dancer rollers are used; and

FIG. 11 is an enlarged side view of the heater in FIG. 10.

Referring now to FIGS. 1 to 3 showing a warping process, a number ofyarns 1 to be treated are pulled out from respective bobbins supportedon a creel stand and passed through a perforated guide board 2. Theseyarns are then passed around guide rollers 3 so as to be arranged into asheet'like wide yarn group comprising, for example, 500 parallel yarns.This process can easily be effected by using a known warper which isusually employed for preparation of warps for woven fabrics.

In order to facilitate the operation for dividing laminated yarn groupsinto an individual yarn, as will be further discussed hereinafter, alease yarn 5 is inserted across the yarns alternately above and below atlongitudinal intervals of 1,000 to 5,000 meters as shown in FIG. 3.Insertion of each lease yarn is effected by moving a reed 4 vertically,once upwardly and once downwardly for each insertion, while using theguide rollers 3 as sheet holders. The lease yarn 5 is cut into pieces inorder that each piece may be threaded through the same number of yarns(for example 25 yarns) which constitute each narrow tape-like yarngroup, as will be further discussed later. The longitudinally adjacentpieces of the lease yarn 5 are tied together 'at both ends. Thesheet-like wide yarn group thus inserted by the lease yarn 5 is thenwound up on a supply beam 6.

A suitable number of the supply beams 6, for example -8 beams, eachhaving the sheet-like wide yarn group wound up thereon, are arrangedparallel to one another with their axes being at right angles with theadvancing direction of the yarns, as shown in FIGS. 4 and 5. Thesheet-like wide yarn groups drawn out from these supply beams 6 arelaminated successively in layers to form a laminated sheet-like wideyarn group.

The laminated wide yarn group is divided in accordance with theindication of the lease yarns into a plurality, for example 20 rows, ofnarrower tape-like yarn groups 7 each comprising the equal number ofyarns.

In order to attain uniform treatment in liquid and to prevent entanglingof the yarns or other troubles in the course of the process, it isdesirable that the shape or configuration of each narrow tape-like yarngroup is kept evenly throughout the treating process. For this end, eachtape-like yarn group 7 is evenly throttled by a guide member providedjust in front of nip rollers 9 at the entranceof treating liquid vessel8, whereby each tape-like yarn group has a substantially rectangularsectional shape before it is supplied into the vessel 8. This guidemember 10 is preferably formed with a plurality of curved depressions 11around its surface at equal intervals along the lengthwise directionthereof, as best shown in FIG. 6. Accordingly, the yarns are convergedsmoothly into the tape-like yarn groups 7 of uniform width and thicknesswhile passing through the curved depressions 11.

Thus converged tape-like yarn groups 7 are immersed in the treatingliquid in the vessel 8 while maintaining the predetermined width andthickness and are finally subjected to drying treatment in a dryer l2.Kinds of the treating liquid used, the numberof liquid vessels and thedegree of tension imparted to the yarns are determined in accordancewith the kinds of treatment, such as mercerization, dyeing, resintreatment, etc.

Each of the tape-like yarn groups having been subjected to the dryingtreatment further advances through a pair of nip rollers 13 and guideroller 14 and then passes around delivery rollers 15 arranged in pairsand spaced apart from other ones at fixed intervals with sidewisedisplacement. The tape-like yarn groups 7 are then wound up onassociated take-up beams 16 which are positively rotated by a suitablepower source 17 such as torque motor shown in FIG. 7 in response to thetension of the yarn groups being wound. The tape-like yarn groupcomprises a number of yarns laminated in layers and is relatively thick,so that, in order to maximize the amount of yarns taken-up, each take-upbeam 16 is provided with a width several times greater than that of eachtape-like yarn group and is traversed while taking up the latter.

Then, each beam 16 is set on a beam stand 18 from where the tape-likeyarn group is drawn out and passed through a pair of guide rollers 19.The yarn group is now broken up and separated into individual yarns,which are then passed through a perforated guide board 20. In theembodiment shown in FIGS. 8 and 9, the tape-like yarn group is led fromthe take-up beam 16 directly to the guide rollers 19, but, preferably,in order to facilitate breaking-up of the yarn group into the individualyarns to be passed through the perforated guide board 20, the guiderollers 19 are spaced as much away from the beam 16 as possible and abeater and dancer rollers may be provided therebetween as shown in FIG.10. The beater 23 expedites the separation of the yarns at the finalyarn separating process as shown in FIG. 11, while the dancer rollers 24serve to absorb impact or inertia force in the travelling yarns.

The perforated guide board 20 is disposed in parallel to a creel 21 andcomprises the same number of yarn guide holes as bobbins 22 mounted onthe creel 21. The yarns in the uppermost layer of the tape-like yarngroup are passed through holes of the uppermost horizontal row in theperforated guide board 20 and wound up on the uppermost bobbins 22 onthe creel 21. Likewise, the yarns in other layers of the yarn group arepassed through corresponding yarn guide-holes in the perforated guideboard. As mentioned above, the lease yarn 5 is inserted above and belowthe yarns forming each layer of the tape-like yarn group 7 so as toregulate the separability between layers as well as the adjacent yarnsin the group. Accordingly, as the operation for inserting the yarns intothe corresponding yarn guide holes in the perforated guide board 20 canbe effected at places where the lease yarns 5 are strung through theyarns, the breaking-up of the yarn group into the individual yarns isachieved quickly and positively. Also, if the lease yarns 5 used foreach layer of the laminated yarn group are tinted with different colors,it will greatly expedite the operation for separating the yarn groupinto each layer. The number of the yarn guide holes in one verticalcolumn is equal to or may be more than that of the layers in eachtape-like yarn group, while the number of the yarn guide holes in onehorizontal row is equal to or may be more than that of yarns in onelayer. Before passing the yarns through the yarn guide holes, the leaseyarn is cut off and the yarns are wound up on the respective bobbins onthe creel 21.

In the present invention, a laminated yarn group comprising a pluralityof sheet-like yarn groups each consisting of multiple parallel yarns isdivided into a plurality of tape-like parallel narrow yarn groups, sothat even in case the yarns are subjected to liquid treatment throughseveral liquid vessels under a positive tension as in the case ofmercerization, no sheet slits are produced.

Furthermore, if the number of the yarns constituting each layer of thetape-like yarn group is made equal to that of the yarn guide holes inone horizontal row of the perforated guide board to be used in the finalyarn separating process and if the number of the layers in the tape-likeyarn group is made equal to that of the yarn guide holes in one verticalcolumn of the perforated guide board, the operation for separating theyarn group into individual yarns will be effected with ease.

Also, a great number of the yarns are formed into a plurality oftape-like narrower yarn groups and then immersed into the treatingliquid, so that even when each tape-like yarn group is composed ofmultiple layers, the treating liquid penetrates uniformly throughout theyarn group.

Furthermore, the lease yarns are inserted into or strung through, atfixed intervals, each of the layers constituting the tape-like yarngroup, so that when the yarn group is to be separated into individualyarns, upper and lower yarn layers can be distinctly partitioned togreatly expedite final separation. In addition, if the lease yarn isinserted alternately above and below each yarn, the free movement ofeach yarn is restricted,

thereby allowing still easier and still more effective separation of theyarns.

Though the present invention has been described by way of a preferredembodiment thereof, it will be apparent to those skilled in the art thatmany modifications and alternations may be made within the scope of thespirit of the present invention.

What is claimed is:

1. A method for treating yarns comprising the steps of drawing out aplurality of sheet-like yarn groups each having parallel yarns fromrespective supply beams, laminating said sheet-like yarn groups inlayers to form a laminated yarn group, dividing said laminated yarngroup into a plurality of parallel narrow yarn groups by means of leaseyarns provided across said parallel yarns at predetermined intervals,each of said divided yarn groups having the same number of yarns andconstituting a layer of said narrow yarn group, immersing said narrowyarn groups into treating liquid for treatment, winding up each narrowyarn group to a take-up beam associated with that narrow yarn group,drawing out each narrow yarn group from its said takeup beam, separatingsaid narrow yarn group into layers by means of said lease yarns, andwinding up said yarns separately on respective bobbins.

2. A yarn treating method as claimed in claim 1, wherein a plurality ofsaid take-up beams are arranged with their axes being at right angleswith the advancing direction of said yarns, said take-up beams beingaway from one another along the yarn advancing direction.

sorbed by dancer rollers.

1. A method for treating yarns comprising the steps of drawing out aplurality of sheet-like yarn groups each having parallel yarns fromrespective supply beams, laminating said sheet-like yarn groups inlayers to form a laminated yarn group, dividing said laminated yarngroup into a plurality of parallel narrow yarn groups by means of leaseyarns provided across said parallel yarns at predetermined intervals,each of said divided yarn groups having the same number of yarns andconstituting a layer of said narrow yarn group, immersing said narrowyarn groups into treating liquid for treatment, winding up each narrowyarn group to a take-up beam associated with that narrow yarn group,drawing out each narrow yarn group from its said take-up beam,separating said narrow yarn group into layers by means of said leaseyarns, and winding up said yarns separately on respective bobbins.
 2. Ayarn treating method as claimed in claim 1, wherein a plurality of saidtake-up beams are arranged with their axes being at right angles withthe advancing direction of said yarns, said take-up beams being awayfrom one another aloNg the yarn advancing direction.
 3. A yarn treatingmethod as claimed in claim 1, wherein each of said lease yarns isinserted alternately above and below said yarns, said lease yarns beingdifferently colored.
 4. A yarn treating method as claimed in claim 1wherein said yarns wound up on said take-up beam are passed through aperforated guide board in accordance with the indication of said leaseyarns, said yarns between said take-up beam and said perforated guideboard being beaten by a beater to facilitate separation thereof andtheir impact or inertia force being absorbed by dancer rollers.